goodrick



(No Model.) 2 Shets-Sheet 2. E. W. GOODRICK.

, PAPER PULP SCREEN. No. 475,041. Paten-ted May 17,'-1892-- UNITED STATES PATENT OFFICE..y

EDVARD WV. GOODRICK, OF APPLETON, WISCONSIN, ASSIGNOR TO THE APPLETON MACHINE COMPANY AND S. R. VAGG, OE SAME PLACE.

PAPER-PU LP SCREEN.

EPECIFXCATION forming part of Letters Patent No. 475,041, dated May 17, 1892.

i Application filed November 9, 1891. Serial No. 411,304. (No model.)

To a/ZZ whom it may concern:

Be it known that I, EDWARD W. GooDRIcK, a citizen of the United States, residing at Appleton, in the county of Outagamie and State of Wisconsin, have invented certain new and useful Improvements in Paper-Pulp Screens; and I do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Myinvention relates to that class of paperpulp screens in which means are employed to agitat-e or liberate the pulp from clogging the meshes of the screen.

The object of my device is to provide superior mechanism for accomplishing the screening operation in a more thorough and eflicacious manner than heretofore; and to this end my invention consists in the peculiarities more fully described hereinafter, and pointed out in the claims.

In lthe accompanying drawings, Figure l represents a side elevation in section; Fig. 2, a top view, in which the screen is removed to better show the mechanism below; and Fig. 3, a sectional end elevation.

The entire machine is supported upon suit'- able legs a, rigidly bolted down to the l'loor. A vat b, having a curved bottom b and lateral wings b, is mounted upon the legs a, and a stock-hopper c is secured to the wings b and edges of the vat by any suitable fast-enings, such as bolts c. A series of rotary disks d are located within and are fixed to a horizontal drive-shaft e,which passes through packing-boxes f in the sides of the .vat and rotates in bearings g. The vat is divided into several compartments h of equal size, formed by the longitudinal partitions h', which eX- tend transversely to the axis of the disks d, and also by a transverse vertical partition j, extending parallel with the drive-shaft, and hence the axis of the disks. This vertical partition j is provided with openings in which the disks revolve, as little space as possible being left between the edges of the partition and the disks in order to insure tightness and cut off as much communication as possible between the compartments. In the present instance tour disks and eight compartments are shown, the disks being so arranged relative to the compartment that each compartment will contain half a disk for the purpose which will be presently described.

The hopper is provided with the usual horizontal screen Zt. A vertical partition lis placed within the hopperat a point between the outlet-pipe fmand vat h, and the lower part ot' this partition is provided with a recess l. Interposed between this partition Z and the outletm is a lowinclined partition n, against which the outfiowing material strikes before descending into the pipe m.

All of the disks d are constructed alike and each are provided with a curved or arc-shaped internal passage o, one end o of which commences at the vertical side ofthe disk between the axis ot the disk and its periphery and at a point nearer to the axis than the periphery, while the opposite end o of the passage terminates at the periphery and diametrically opposite the axis of the disk. This outlet end o slopes gradually into the periphery of the disk, and it will be seen that the receiving end o of the passage Will be within one compartment, while the disch arge-opening o is within another compartment, for the purpose of drawing the fluid from one compartment and discharging it in the other when the disks are rotating. The disks are so arranged on the drive-shaft that one-half the number will beA discharging upon one side of the vertical partition e, while the other half of the number are discharging upon the opposite side. The purpose of these rotary disks and their curved passages is to set up active currents in the i'luid in the vat, thereby agitating the stock or material as it lands upon the screen and keepin g the latter clear and free from clogging.

When in operation, the disks revolve rapidly and the duid mass of material in the vat is made to enter the receiving end oiof the passage o and by centrifugal force is discharged with great force at the periphery of the wheel through the openings o, as shown by arrows in Fig. 3. In this operation it Will be seen that each disk acts independently of the other and, as previously stated, the uid enters the disk from one compartment and is roo discharged into the opposite compartment, this action taking place alternately as the ressl ceiving end of the passage moves from one side of the vertical partition to theotheiside. When the disks are revolving at the rate of ve hundred and titty revolutions a minute, the uid discharges from their peripheries with great force, thereby causing such a pul sation of internal currents thatthe paper stock is violently agitatedand drawn through the screen and discharged at one end of the hopper, through the recess Z', over the sloping partition n, and out of the pipe m, asindicated by arrows. By this arrangement all knots, dirt, and extraneous matter are caught on top of the screen, from which it vcaribe-readilyV passagejeccentric to receive at the sideand.

discharge at the periphery of the disk,in the manner and for the purpose set forth.

3. Ina pulp-screen, a disk provided with an open internal eccentric passage discharging at theperiphery,as and for the purpose set forth'.

4. .In a pulp-screen, a rotaryV disk located in a vat and provided with an internal passage,

in combination with a vertical partitionfitting around the disk and forming separate compartments upon opposite sides thereof, said passage being adapted to extend from one compartment to the other, as and for the purpose specified.

5.V The combination, with ascreen. and yvat containing compartments, of ka rotary disk havingits opposite sides revolving in the con1- partments and provided with a Huid-passage extending through the disk from one compartment to the other,in the manner and for the purpose substantially'as described.

6. In a pulp-screen, the combination of a vat., hopper, and screen, ahorizontal rotary shaft. carrying disks provided with arc-shaped eccentric passages receiving at the sides of the disk and` discharging atv the periphery,

and. one or more vertical partitions dividing the vat into compartments, in the manner and for the purpose substantially as set for-thi.;

l 7. In a pulp-screen, thecombination. of a.

vat, a screen and hopper above the vat, a horizontal shaft extending through the vat, a vertical parttion,and .a series of disks diametrically embraced by the partition, said disksbeing provided with arc-shaped open passages extending from one compartment to t he other, as and for the purpose described. r In testimony whereofI affix my signature-in presence of two Witnesses. EDWARD W. GOODRICK...

litnessesz N. M. EDWARDS,

ORLANDO E. CLARK.r 

